ES2101787T3 - PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS. - Google Patents

PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS.

Info

Publication number
ES2101787T3
ES2101787T3 ES92120720T ES92120720T ES2101787T3 ES 2101787 T3 ES2101787 T3 ES 2101787T3 ES 92120720 T ES92120720 T ES 92120720T ES 92120720 T ES92120720 T ES 92120720T ES 2101787 T3 ES2101787 T3 ES 2101787T3
Authority
ES
Spain
Prior art keywords
cellulose
reaction
procedure
eters
preparation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES92120720T
Other languages
Spanish (es)
Inventor
Heinz Wallisch
Reinhard Dr Donges
Ulrich Dr Meyer-Blumenroth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Application granted granted Critical
Publication of ES2101787T3 publication Critical patent/ES2101787T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

LA INVENCION CONCIERNE A UN PROCEDIMIENTO PARA EL TRATAMIENTO DEPURADOR DE LOS MEDIOS LIQUIDOS DE REACCION Y/O DE LAVADO, PRODUCIDOS DURANTE LA OBTENCION DE ETERES DE CELULOSA INSOLUBLES EN AGUA CALIENTE, A PARTIR DE CELULOSA, HIDROXIDO ALCALINO Y AL MENOS UN AGENTE DE ETERIFICACION EN UN AGUA, Y EN TODO CASO AL MENOS UN MEDIO CONTENIENDO UN DISOLVENTE ORGANICO, POR MEDIO DE LA ULTRAFILTRACION EN UN PERMEATO Y CONCENTRADO, QUE SE CARACTERIZA PORQUE LA ULTRAFILTRACION DE LOS AGENTES DE REACCION Y/O LAVADO SE REALIZA A UNA TEMPERATURA DE O POR ENCIMA DE LA TEMPERATURA DE FLOCULACION DEL ETER DE CELULOSA.THE INVENTION CONCERNS A PROCEDURE FOR THE TREATMENT TREATMENT OF LIQUID REACTION AND / OR WASHING MEDIA, PRODUCED DURING THE OBTAINING OF CELLULOSE ETERES IN HOT WATER, FROM CELLULOSE, ALCOHOL AND ALCOHOL EARTHWATER. A WATER, AND IN ALL CASES AT LEAST A MEDIUM CONTAINING AN ORGANIC SOLVENT, THROUGH ULTRAFILTRATION IN A PERMEATE AND CONCENTRATE, WHICH IS CHARACTERIZED BECAUSE THE ULTRAFILTRATION OF REACTION AGENTS AND / OR WASHING IS PERFORMED BY A TEMPER ABOVE THE FLOCULATION TEMPERATURE OF CELLULOSE ETER.

ES92120720T 1991-12-06 1992-12-04 PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS. Expired - Lifetime ES2101787T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4140272 1991-12-06

Publications (1)

Publication Number Publication Date
ES2101787T3 true ES2101787T3 (en) 1997-07-16

Family

ID=6446448

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92120720T Expired - Lifetime ES2101787T3 (en) 1991-12-06 1992-12-04 PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS.

Country Status (7)

Country Link
US (1) US5500124A (en)
EP (1) EP0545426B1 (en)
CA (1) CA2084589A1 (en)
DE (1) DE59208547D1 (en)
ES (1) ES2101787T3 (en)
FI (1) FI925499A (en)
MX (1) MX9207037A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9312219D0 (en) * 1993-06-14 1993-07-28 Dow Deutschland Inc Purification of aqueous reaction or washing medium containing cellulose ethers
US5504201A (en) * 1994-03-14 1996-04-02 The Dow Chemical Company Process for recovering salable cellulose ethers from an aqueous medium containing such cellulose ethers
IT1295832B1 (en) * 1997-10-28 1999-05-28 Proras Srl PROCESS AND PLANT FOR EXTRACTION AND CONCENTRATION OF TANNIN FROM WOOD AND OTHER NATURAL PRODUCTS
DE19941893A1 (en) * 1999-09-03 2001-03-08 Clariant Gmbh Low viscosity, hot water flocculable cellulose ethers, processes for their preparation by depolymerization and their use
ATE336515T1 (en) * 2001-02-28 2006-09-15 Hercules Inc METHOD FOR SEPARATING CELLULOSE ETHER FROM AQUEOUS SOLUTIONS USING ULTRAFILTRATION WITH ENHANCED SHEAR EFFECT
JP4029272B2 (en) * 2002-03-11 2008-01-09 信越化学工業株式会社 Admixture and hydraulic composition for extrusion molding using the same
KR101137639B1 (en) * 2004-11-02 2012-04-19 신에쓰 가가꾸 고교 가부시끼가이샤 Method of separating water-soluble cellulose ether
DE102006042438A1 (en) * 2006-09-09 2008-03-27 Wolff Cellulosics Gmbh & Co. Kg Process for washing polysaccharide derivatives

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873518A (en) * 1973-12-14 1975-03-25 Dow Chemical Co Water soluble ternary cellulose ethers
FR2351063A1 (en) * 1976-05-12 1977-12-09 Rhone Poulenc Ind STATIONERY EFFLUENT TREATMENT
JPS5768190A (en) * 1980-10-13 1982-04-26 Shin Etsu Chem Co Ltd Treatment of nonionic cellulose ether dissolved waste water
DE3331997A1 (en) * 1983-09-05 1985-03-21 Hoechst Ag, 6230 Frankfurt METHOD FOR PURIFYING AQUEOUS DISTILLATION RESIDUES DURING THE TREATMENT OF LIQUIDS RESULTING FROM THE PRODUCTION OF CELLULOSEETHERS
US4581446A (en) * 1985-03-15 1986-04-08 The Dow Chemical Company Purification of cellulose ethers
US4830753A (en) * 1986-04-28 1989-05-16 Rohm And Haas Company Membrane filtration of cell culture media with charged particles
JPS6363274A (en) * 1986-09-03 1988-03-19 Konica Corp Reader
US4988807A (en) * 1989-01-23 1991-01-29 The Dow Chemical Company Removal of undesirable material from water-soluble polysaccharide ethers
US5218107A (en) * 1991-12-30 1993-06-08 The Dow Chemical Company Removal of undesirable material from water-soluble cellulose ether aqueous solutions

Also Published As

Publication number Publication date
EP0545426B1 (en) 1997-05-28
FI925499A0 (en) 1992-12-03
EP0545426A3 (en) 1993-07-14
DE59208547D1 (en) 1997-07-03
FI925499A (en) 1993-06-07
EP0545426A2 (en) 1993-06-09
US5500124A (en) 1996-03-19
MX9207037A (en) 1993-06-01
CA2084589A1 (en) 1993-06-07

Similar Documents

Publication Publication Date Title
NO972086L (en) Cooling system for a reactor unit with ultraviolet lamps
AT388365B (en) DEVICE FOR TREATING WATER
DK233189D0 (en) PROCEDURE FOR CLEANING AND DISINFECTING HEAT AND CORROSION-SENSITIVE MEDICAL DEVICES, INSIDE ENDOSCOPES, AND IMPLEMENTATION FOR THE PROCEDURE
SE8301762L (en) DEVICE FOR MAGNIFICATION OF MICRO-ORGANISMS
ES2072017T3 (en) PROCEDURE AND APPARATUS FOR THE PERFECTED TANGENTIAL FILTRATION.
HK1069781A1 (en) Apparatus and process for sterilization of liquid media by means of uv irradiation and short-time heat treatment
ATE808T1 (en) SANITIZING DEVICE FOR FLOWING MEDIUM.
ATE297537T1 (en) COOLER
ES2106629T3 (en) PROCEDURE FOR THE INHIBITION OF THERMOPHILIC MICROORGANISMS IN THE PRESENCE OF AQUEOUS MEDIA CONTAINING SUGAR.
MX162053A (en) IMPROVEMENTS IN SYSTEM AND METHOD FOR MONITORING, DIAGNOSIS AND CONTROL OF THE CHEMICAL COMPOSITION OF WATER AND STEAM
MX9302322A (en) METHOD FOR CLEANING AND MAINTENANCE OF WATER HEATERS.
ES2101787T3 (en) PROCEDURE FOR THE PURIFYING TREATMENT OF REACTION AND / OR WASHING MEANS THAT RESULT IN THE PREPARATION OF CELLULOSE ETERS.
ATE27446T1 (en) PROCESS FOR THE PRODUCTION OF 1,2,3-TRICHLORO-2METHYL-PROPANE.
IT8024290A0 (en) PROCEDURE FOR THE PURIFICATION OF RESIDUAL WATER CONTAINING DYES.
ES2099277T3 (en) MANUFACTURING PROCEDURE OF AN INDUSTRIAL AQUEOUS SOLUTION OF SODIUM CHLORIDE.
IT8049193A0 (en) SYSTEM FOR THE DISPOSAL OF SEWAGE WATER PARTICULARLY FOR VESSELS
ATE15646T1 (en) PROCESS FOR THE PREPARATION OF HYDROXY-PHENOXYALKANCARBONS|URES.
ES2038876T3 (en) PROCEDURE FOR THE REGENERATION OF WASTE WATER FROM GASIFICATION FACILITIES MADE OPERATED AT HIGH PRESSURE.
DE69009305D1 (en) Water dispenser.
DK0818206T3 (en) Method of disinfecting and cleaning small parts and device suitable therefor
SE8200328L (en) VERMEATERVINNINGSBEHALLARE
JPS57113884A (en) Ultraviolet water sterilizer
TR21296A (en) MICROCAPS * LATION PROCEDURE *
ES2164445T3 (en) PROCEDURE FOR OBTAINING WATER SOLUTIONS OF HIGH PURITY HYDROXYLAMINE.
JPS57113883A (en) Ultraviolet water sterilizer

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 545426

Country of ref document: ES